def test_bfs_4steps():
global goal_state
print "Testing BFS in 4 steps..."
hp_0 = HuarongPass(initial_state)
hp_24 = HuarongPass(step_24_state)
hp_41 = HuarongPass(step_41_state)
hp_59 = HuarongPass(step_59_state)
goal_state = step_24_state
acts_0_24 = search.breadth_first_search(hp_0).solution()
goal_state = step_41_state
acts_24_41 = search.breadth_first_search(hp_24).solution()
goal_state = step_59_state
acts_41_59 = search.breadth_first_search(hp_41).solution()
goal_state = None
acts_59_81 = search.breadth_first_search(hp_59).solution()
print len(acts_0_24), acts_0_24
print len(acts_24_41), acts_24_41
print len(acts_41_59), acts_41_59
print len(acts_59_81), acts_59_81
acts = acts_0_24 + acts_24_41 + acts_41_59 + acts_59_81
print "Total steps: ", len(acts)
audit_state(hp_0.state_given(initial_state, acts))
print "BFS test complete. (4 step)"
def huarong_pass_search(search_name):
goal_actions = []
hp = HuarongPass()
if search_name == 'BFS':
# print "Breadth first search...good choice. ", time.asctime()
goal_actions = search.breadth_first_search(hp).solution()
elif search_name == 'DFS':
# print "Depth first search...really?", time.asctime()
goal_actions = search.depth_first_graph_search(hp).solution()
elif search_name == 'IDS':
# print "Iterative deepening search...great choice!", time.asctime()
goal_actions = search.iterative_deepening_search(hp).solution()
elif search_name == 'BID':
# print "Bidirectional search...not required...using BFS instead..."
goal_actions = huarong_pass_search('BFS')
elif search_name == 'DLS':
# print "Depth limited search...", time.asctime()
goal_actions = search.depth_limited_search(hp, DEPTH_LIMIT).solution()
else:
print "Invalid search_name given. Exiting..."
return goal_actions
def test_breadth_first_search_four_step():
# plan of length 4
task = dummy_task.get_simple_search_space_2()
solution = breadth_first_search(task)
print(solution)
assert solution != None
assert len(solution) == 4
def test_breadth_first_search_at_goal():
# plan of length 0, start == goal
task = dummy_task.get_search_space_at_goal()
solution = breadth_first_search(task)
print(solution)
assert solution != None
assert len(solution) == 0
def test_bfs():
print "Testing BFS..."
# test_bfs_7steps()
# test_bfs_4steps()
hp_0 = HuarongPass(initial_state)
hp_57 = HuarongPass(step_57_state)
goal_state = None
acts_57_81 = search.breadth_first_search(hp_57).solution()
print len(acts_57_81), acts_57_81
acts = acts_57_81
print "Total steps: ", len(acts)
audit_state(hp_0.state_given(step_57_state, acts))
print "BFS test complete."
def length_of_shortest_cycle(incidents, vert1, vert2):
"""Returns the length of the shortest cycle in a graph
with given INCIDENTS through the edge VERT1 --> VERT2.
Assumes this edge is not contained in incidents."""
problem = GraphSearchProblem(vert1, vert2, graph_path_goal_test, incidents)
x = breadth_first_search(problem)
return x[3]
def main():
game = solitaire([['O', '_', '_', 'O', '_'], ['O', '_', 'O', '_', 'O'],
['_', 'O', '_', 'O', '_'], ['O', '_', 'O', '_', '_'],
['_', 'O', '_', '_', '_']])
p = InstrumentedProblem(game)
resultBreadthFirstSearch = breadth_first_search(p)
print(resultBreadthFirstSearch.solution())
print(resultBreadthFirstSearch.path()[0].state.board)
def main():
print("MAIN")
prob1 = Calculator()
prob2 = Calculator((2, 6, 0), (2, 6, 15))
prob3 = Calculator((3, 7, 11), (3, 7, 100))
# Resolviendo el problema 1:
print("Problema 1: (2, 3, 0) -> 13")
print("Solución del Problema 1 mediante búsqueda primero en anchura")
meta1 = breadth_first_search(prob1)
if meta1:
despliega_solucion(meta1)
else:
print("Falla: no se encontró una solución")
# Resolviendo el problema 2:
print("Problema 2: (2, 6, 0) -> 15")
print("Solución del Problema 2 mediante búsqueda primero en anchura")
meta2 = breadth_first_search(prob2)
if meta2:
despliega_solucion(meta2)
else:
print("Falla: no se encontró una solución")
# Resolviendo el problema 3:
print("Problema 3: (3, 7, 11) -> 100")
print("Solución del Problema 3 mediante búsqueda primero en anchura")
meta3 = breadth_first_search(prob3)
if meta3:
despliega_solucion(meta3)
else:
print("Falla: no se encontró una solución")
# Resolviendo el problema 3:
print("\nProblema 3: (3, 7, 11) -> 100")
print("Solución del Problema 3 mediante A*")
meta4 = astar_search(prob3)
if meta3:
despliega_solucion(meta4)
else:
print("Falla: no se encontró una solución")
def bfs_tests(breadth_first_search):
romania = pickle.load(open('romania_graph.pickle', 'rb'))
bfs_paths = pickle.load(
open('solution_files/romania_bfs_test_paths.pickle', 'rb'))
for key, value in bfs_paths.items():
start, goal = key
right_path, right_closed = value
romania.reset_search()
path = breadth_first_search(romania, start, goal)
closed = list(romania.get_explored_nodes())
path_is_valid = is_path_correct(romania, start, goal, path)
max_nodes_explored = max(int(len(right_closed) * 1.2),
len(right_closed) + 3)
node_exploration_valid = len(closed) <= max_nodes_explored
path_is_correct = True
if path and right_path:
path_is_correct = len(path) <= len(right_path)
if (path and not right_path) or (not path and right_path):
path_is_correct = False
if not (path_is_valid and node_exploration_valid and path_is_correct):
print(
'Breadth first search fails benchmarks searching from %s to %s: '
% (start, goal))
if not path_is_valid:
print('Path %s does not go from %s to %s' %
(str(path), str(start), str(goal)))
if not node_exploration_valid:
print(
'Nodes explored should be a valid frontier, and be no more than %d in number'
% (max_nodes_explored))
if not path_is_correct:
print('Path %s is longer than an optimal path %s' %
(str(path), str(right_path)))
return
print('BFS tests passed.')
def main():
# Runs the Family police thief problem, will provide a path to move all family members to the right side without
# leaving the mom alone with the male children, the dad alone with the female children, and the thief with any of
# the family members without the police officer
print('Family Cop Thief Problem: ')
print(
' Tuples are in this format --> [<Node (mom, dad, leftFemaleKid, leftMaleKid,rightFemaleKid, rightMaleKid,police, thief, boatSide)>]')
goalState = (1, 1, 0, 0, 2, 2, 1, 1, 1)
problem = FRP(goalState)
goal = breadth_first_search(problem)
# print("\nPath = ",goal.path(),"\n\nPath cost = ",goal.path_cost)
print(" Steps = " + str(goal.path()), "\n Cost = " + str(goal.path_cost))
print()
def main():
"""Default function to be called when the program executes."""
# Create an instance of the Search class with arguments from argparse
searcher = Search(start, stop, args.grid)
# Return the correct searching algorithm for a given specification
if args.alg == 'bfs':
search = aima.breadth_first_search(searcher)
elif args.alg == 'ucs':
search = aima.uniform_cost_search(searcher)
else:
search = aima.astar_search(searcher)
return search.path()
def test_bfs_7steps():
global goal_state
print "Testing BFS in 7 steps..."
hp_0 = HuarongPass()
hp_0.set_initial_state(initial_state)
hp_24 = HuarongPass(step_24_state)
hp_30 = HuarongPass(step_30_state)
hp_41 = HuarongPass(step_41_state)
hp_48 = HuarongPass(step_48_state)
hp_59 = HuarongPass(step_59_state)
hp_72 = HuarongPass(step_72_state)
hp_81 = HuarongPass(step_81_state)
goal_state = step_24_state
acts_0_24 = search.breadth_first_search(hp_0).solution()
goal_state = step_30_state
acts_24_30 = search.breadth_first_search(hp_24).solution()
goal_state = step_41_state
acts_30_41 = search.breadth_first_search(hp_30).solution()
goal_state = step_48_state
acts_41_48 = search.breadth_first_search(hp_41).solution()
goal_state = step_59_state
acts_48_59 = search.breadth_first_search(hp_48).solution()
goal_state = step_72_state
acts_59_72 = search.breadth_first_search(hp_59).solution()
goal_state = None
acts_72_81 = search.breadth_first_search(hp_72).solution()
print len(acts_0_24), acts_0_24
print len(acts_24_30), acts_24_30
print len(acts_30_41), acts_30_41
print len(acts_41_48), acts_41_48
print len(acts_48_59), acts_48_59
print len(acts_59_72), acts_59_72
print len(acts_72_81), acts_72_81
acts = acts_0_24 + acts_24_30 + acts_30_41 + acts_41_48 + acts_48_59 + acts_59_72 + acts_72_81
print "Total steps: ", len(acts)
audit_state(hp_0.state_given(initial_state, acts))
print "BFS test complete. (7 step)"
def main():
#Runs the Water Jug problem, will provide a solution to fill the three jugs
# to a 2,2,3 configuration without overfilling a jug and only by pouring
# until the pouring jug is empty or the recieving jug is full
print('Water Jug Problem: ')
print(
' Tuples are in this format --> [<Node (Seven-liter, Four-liter, Three-liter)>]'
)
goalState = (2, 2, 3)
problem = WJP(goalState)
goal = breadth_first_search(problem)
print("\nPath = ", goal.path(), "\n\nPath cost = ", goal.path_cost)
#print(" Steps = " + str(goal.path()), "\n Cost = " + str(goal.path_cost))
print()
def get_all_states(dim=3):
""" In order to get all possible states for an npuzzle, you can simply pass
any valid n-puzzle state as the initial state, and an invalid n-puzzle
state as the goal; the
"""
# goal state should be a tuple of the the first dim*dim positive intgers
goal_state = tuple(range(1, dim*dim + 1))
invalid_state = invalid_init_state(dim)
# invalid_state is easy to produce.
npp = NPuzzleProblem(invalid_state, goal_state)
allstates = search.breadth_first_search(npp)
return allstates
def populate(self, projected_task, vars_maps, actions_maps):
from itertools import product
from search import breadth_first_search
from model.generic.planning.task import State
var_map, inv_var_map = vars_maps
action_map, inv_action_map = actions_maps
domains = [x.domain for x in projected_task.task.state_vars]
value_index = 0
self.unsolvable_count = 0
self.num_non_zero_entries = 0
self.max_value = 0
for valuation in apply(product, map(tuple, domains)):
value_index += 1
# indexed with the original vars
entry_index = tuple([(inv_var_map[x], v)
for x, v in enumerate(valuation)])
s0 = State(projected_task.task,
[(x, v) for x, v in enumerate(valuation)])
projected_task.set_initial_state(s0)
projected_task.initial_state.check_valid()
if not projected_task.initial_state.valid:
self.table[entry_index] = Entry(float('inf'), None)
self.unsolvable_count += 1
continue
plan = breadth_first_search(projected_task, True)
if plan is None:
self.table[entry_index] = Entry(float('inf'), None)
self.unsolvable_count += 1
continue
first_action_in_plan = None
if len(plan) > 0:
self.num_non_zero_entries += 1
first_action_in_plan = inv_action_map[plan[0].index]
self.table[entry_index] = Entry(len(plan), first_action_in_plan)
self.max_value = max(self.max_value, len(plan))
logging.info('# of infinite entries in pattern: {0}'.format(
self.unsolvable_count))
logging.info('# of entries with a value greater than 0: {0}'.format(
self.num_non_zero_entries))
logging.info('Maximum value in pattern: {0}'.format(self.max_value))
def bfs_tests(breadth_first_search):
romania = pickle.load(open('romania_graph.pickle', 'rb'))
bfs_paths = pickle.load(open('solution_files/romania_bfs_test_paths.pickle', 'rb' ))
for key, value in bfs_paths.items():
start, goal = key
right_path, right_closed = value
romania.reset_search()
path = breadth_first_search(romania, start, goal)
closed = list(romania.get_explored_nodes())
path_is_valid = is_path_correct(romania, start, goal, path)
max_nodes_explored = max(int(len(right_closed) * 1.2), len(right_closed) + 3)
node_exploration_valid = len(closed) <= max_nodes_explored
path_is_correct = True
if path and right_path:
path_is_correct = len(path) <= len(right_path)
if (path and not right_path) or (not path and right_path):
path_is_correct = False
if not (path_is_valid and node_exploration_valid and path_is_correct):
print('Breadth first search fails benchmarks searching from %s to %s: '%(start, goal))
if not path_is_valid:
print('Path %s does not go from %s to %s'%(str(path),str(start), str(goal)))
if not node_exploration_valid:
print('Nodes explored should be a valid frontier, and be no more than %d in number'%(max_nodes_explored))
if not path_is_correct:
print('Path %s is longer than an optimal path %s'%(str(path),str(right_path)))
return
print('BFS tests passed.')
def main():
"""Run simple test using BFS to solve random puzzle."""
puzzle = create_random_eight_puzzle(25)
print('A random puzzle:')
print(puzzle)
problem = EightPuzzleSearchProblem(puzzle)
path = search.breadth_first_search(problem)
print(('BFS found a path of %d moves: %s' % (len(path), str(path))))
curr = puzzle
i = 1
for a in path:
curr = curr.result(a)
print(('After %d move%s: %s' % (i, ("", "s")[i > 1], a)))
print(curr)
input("Press return for the next state...") # wait for key stroke
i += 1
def test_breath_first_search(self):
print(
"Starting breath first search test",
"If it cannot finish within 30s, "
"please kill the job and review your code")
print("---------------------------------------------")
puzzle = EightPuzzleState([3, 0, 5, 6, 2, 4, 7, 8, 1])
problem = PuzzleSearchProblem(puzzle)
path, step = search.breadth_first_search(problem)
print("Test BFS on: \n")
print(puzzle)
self.print_result("BFS", step, problem.get_costs(path), path)
curr = puzzle
for a in path:
curr = curr.next_state(a)
self.assertTrue(curr.is_goal(), "The final state is not goal test")
print("=============================================")
def test_breath_first_search(self):
print("Starting breath first search test")
print("---------------------------------------------")
with Timer(30,
error_message=
"Breath First Search cannot find the solution within 30s"):
puzzle = EightPuzzleState([3, 0, 5, 6, 2, 4, 7, 8, 1])
problem = PuzzleSearchProblem(puzzle)
path, step = search.breadth_first_search(problem)
print("Test BFS on: \n")
print(puzzle)
self.print_result("BFS", step, problem.get_costs(path), path)
curr = puzzle
for a in path:
curr = curr.next_state(a)
self.assertTrue(curr.is_goal(), "The final state is not goal test")
print("=============================================")
def BuscaLargura(self):
table = self.get_table()
print(table)
initial_state = StateNode(Game8(table), None, None, 0, 0)
start = int(round(time.time() * 1000))
path = breadth_first_search(initial_state)
end = int(round(time.time() * 1000))
for state in path:
self.depth_label['text'] = 'Profundidade: ' + str(state.depth)
b = state.game.get_b_position()
state.game.table[b[0]][b[1]] = ''
self.set_table(state.game.table)
state.game.show_table()
time.sleep(1)
self.generated_nodes_label['text'] = 'Nós gerados: ' + str(
s.generated_nodes)
self.execution_time['text'] = 'Tempo de execução (ms): ' + str(end -
start)
def find_path_to_closest_dot(self, game_state):
"""
Returns a path (a list of actions) to the closest dot, starting from
game_state.
"""
# Here are some useful elements of the start_state
start_position = game_state.get_pacman_position()
food = game_state.get_food()
walls = game_state.get_walls()
problem = AnyFoodSearchProblem(game_state)
"*** YOUR CODE HERE ***"
"""
The Breadth First Search algorithm is guaranteed to find a path to the
closest dot and it is optimal in this scenario because the cost of each
action is one
"""
return search.breadth_first_search(problem)
def run(algorithm, grid, start, stop):
"""Verify that the start and stop locations are valid then run the indicated search algorithms
and return the final node. If no algorithm is indicated it will default to A_star search
:param algorithm: The search algorithm to use
:param grid: grid to find a path through
:param start: starting location
:param stop: goal location
:return: The path taken
"""
# Verify start and stop position are valid
if not valid_position(grid, start):
try:
if grid[start] == 0:
print(start,
'Is not a valid start position, it is in an obstacle.')
except IndexError:
print(
start,
'Is not a valid start position. Start position must be within the grid: ',
grid.shape)
exit()
if not valid_position(grid, stop):
try:
if grid[stop] == 0:
print(stop, 'Is not a valid stop position, it is an obstacle.')
except IndexError:
print(
stop,
'Is not a valid stop position. Stop position must be within the range of the grid shape:',
grid.shape)
exit()
my_problem = PathingProblem(start, stop,
grid) # Creating instance of PathingProblem
if algorithm == 'breadth_first_search' or algorithm == 'b':
return breadth_first_search(my_problem)
elif algorithm == 'depth_first_graph_search' or algorithm == 'd':
return depth_first_graph_search(my_problem)
else: # Defaults to a_star search
return astar_search(my_problem)
from board import buildGrid
from board import toggleCell
from board import buildGrid
from board import parseBoard
from cleanUpPuzzle import CleanUpPuzzle
from search import breadth_first_search
from search import uniform_cost_search
from display import displayProblemSolution
import time
BOARD_SIZE = 6
HARD_BOARD = [
'0|1|0|0|0|1',
'0|0|1|0|0|0',
'0|0|0|1|0|1',
'0|1|0|0|1|0',
'0|0|1|0|0|0',
'0|0|0|0|0|0'
]
start_time = time.time()
easy_goal = breadth_first_search(
CleanUpPuzzle(
'\n'.join(HARD_BOARD),
buildGrid(size = BOARD_SIZE)
)
)
print(easy_goal)
displayProblemSolution(easy_goal, 'breadth_first_search', time.time() - start_time)
from trees import Node
from search import (depth_first_search, breadth_first_search,
recursion_tree_traverse)
# Setup Tree
root = Node(0)
root.left = Node(1)
root.right = Node(2)
root.left.left = Node(3)
root.left.right = Node(4)
root.right.left = Node(5)
root.right.right = Node(6)
print('Depth First Search')
depth_first_search(root)
print('=' * 25)
print('Breadth First Search')
breadth_first_search(root)
print('Recursion Tree Traversal')
recursion_tree_traverse(root)
print()
print('=' * 50)
print('=' * 50)
print("EIGHT-PUZZLE PROBLEM")
print('=' * 50)
print('=' * 50)
ep = EightPuzzleProblem([[3, 1, 2], [7, 5, 0], [4, 6, 8]])
print()
print('-' * 50)
print("Running BREADTH-FIRST-TREE-SEARCH")
print('-' * 50)
bfts = breadth_first_search(ep, search_type=uninformed_tree_search)
print("Solution", bfts.solution())
print()
print('-' * 50)
print("Running UNIFORM-COST-TREE-SEARCH")
print('-' * 50)
ucts = uniform_cost_search(ep, search_type=best_first_tree_search)
print("Solution", ucts.solution())
print()
print('-' * 50)
print(
result.append((x, y + 1))
return result
def push(self, x, y):
adjacent_points = self.get_adjacent_nodes(x, y)
for point in adjacent_points:
if point in self.points:
self.points.remove(point)
else:
self.points.append(point)
def print_solution(result):
print("Initial board is: {}".format(result.path()[0].state))
print("The sequence is:")
for action in result.solution():
print("Push tile {}".format(action))
print("Resultant board is: {}".format(result.state))
initial_state = PuzzleState(
points=[(0, 1), (1, 0), (9, 10), (10, 9), (5, 4), (5, 6), (4, 5), (6, 5)])
goal = PuzzleState(points=[])
puzzle = CleanUpPuzzle(initial_state, goal=goal)
result = breadth_first_search(puzzle)
if result:
print_solution(result)
moves: number of random moves to apply
Creates a random eight puzzle by applying
a series of 'moves' random moves to a solved
puzzle.
"""
puzzle = EightPuzzleState([0, 1, 2, 3, 4, 5, 6, 7, 8])
for i in range(moves):
# Execute a random legal move
puzzle = puzzle.result(random.sample(puzzle.legal_moves(), 1)[0])
return puzzle
if __name__ == '__main__':
puzzle = create_random_eight_puzzle(25)
print('A random puzzle:')
print(puzzle)
problem = EightPuzzleSearchProblem(puzzle)
path = search.breadth_first_search(problem)
print(('BFS found a path of %d moves: %s' % (len(path), str(path))))
curr = puzzle
i = 1
for a in path:
curr = curr.result(a)
print(('After %d move%s: %s' % (i, ("", "s")[i > 1], a)))
print(curr)
input("Press return for the next state...") # wait for key stroke
i += 1
def test_breadth_first_search_no_solution():
# plan with no solution
task = dummy_task.get_search_space_no_solution()
solution = breadth_first_search(task)
print(solution)
assert solution == None
'''
Created on Oct 2, 2016
@author: farida
'''
from search import romania_map, GraphProblem, breadth_first_tree_search,\
depth_first_graph_search, iterative_deepening_search,\
recursive_best_first_search, breadth_first_search, uniform_cost_search,\
depth_limited_search
print("Romania Locations:")
print("==================")
print(romania_map.locations)
print("Romania Map:")
print("=============")
print(romania_map.dict)
romania_problem = GraphProblem('Arad', 'Bucharest', romania_map)
print("Search Algorithms Results:")
print("==========================")
print(breadth_first_search(romania_problem).solution())
#print(breadth_first_search(romania_problem).path_cost)
print(uniform_cost_search(romania_problem).solution())
#print(uniform_cost_search(romania_problem).path_cost)
print(depth_first_graph_search(romania_problem).solution())
print(depth_first_graph_search(romania_problem).path_cost)
'''
from search import romania_map, GraphProblem, breadth_first_tree_search,\
depth_first_graph_search, iterative_deepening_search,\
recursive_best_first_search, breadth_first_search, uniform_cost_search,\
depth_limited_search
print("Romania Locations:")
print("==================")
print(romania_map.locations)
print("Romania Map:")
print("=============")
print(romania_map.dict)
romania_problem = GraphProblem('Arad', 'Bucharest', romania_map)
print("Search Algorithms Results:")
print("==========================")
print(breadth_first_search(romania_problem).solution())
#print(breadth_first_search(romania_problem).path_cost)
print(uniform_cost_search(romania_problem).solution())
#print(uniform_cost_search(romania_problem).path_cost)
print(depth_first_graph_search(romania_problem).solution())
print(depth_first_graph_search(romania_problem).path_cost)
if grid[i][j] == u'air':
grid[i][j] = 'a'
elif grid[i][j] == u'diamond_block':
grid[i][j] = 'd'
elif grid[i][j] == u'emerald_block':
grid[i][j] = 'E'
elif grid[i][j] == u'redstone_block':
grid[i][j] = 'R'
else:
grid[i][j] = '?'
pretty_print_grid(grid)
problem = MazeProblem(grid)
if search_alg == 'bfs':
plan = breadth_first_search(problem)
elif search_alg == 'gs':
plan = greedy_search(problem)
if plan:
for action in plan:
print 'action: {0}'.format(action)
command = commands[action]
agent_host.sendCommand(command)
time.sleep(0.5)
world_state = agent_host.getWorldState()
if world_state.is_mission_running or len(
world_state.rewards
) == 0 or world_state.rewards[-1].getValue() < 100.0:
print 'Mission failed: did not reach goal state.'
break
def solve(self, start_status):
start_node = self.nodes.index(start_status)
shortest_path = breadth_first_search(start_node, self.node_edges,
self.is_solved)
return [self.nodes[node] for node in shortest_path]
print print '=' * 50 print '=' * 50 print "EIGHT-PUZZLE PROBLEM" print '=' * 50 print '=' * 50 ep = EightPuzzleProblem([[3, 1, 2], [7, 5, 0], [4, 6, 8]]) print print '-' * 50 print "Running BREADTH-FIRST-TREE-SEARCH" print '-' * 50 bfts = breadth_first_search(ep, search_type=uninformed_tree_search) print "Solution", bfts.solution() print print '-' * 50 print "Running UNIFORM-COST-TREE-SEARCH" print '-' * 50 ucts = uniform_cost_search(ep, search_type=best_first_tree_search) print "Solution", ucts.solution() print print '-' * 50 print "Running GREEDY-BEST-FIRST-TREE-SEARCH USING # MISPLACED TILES HEURISTIC"
return 2
elif node.state == 'F':
return 10
elif node.state == 'G':
return 0
elif node.state == 'S':
return 8
travel_problem = TravelProblem('S', 'G', city_map)
print()
print('-' * 50)
print("Q2: BREADTH-FIRST-TREE-SEARCH")
print('-' * 50)
bfts = breadth_first_search(travel_problem,
search_type=uninformed_graph_search)
print("Solution", bfts.solution())
print()
print('-' * 50)
print("Q3: UNIFORM-COST-GRAPH-SEARCH")
print('-' * 50)
ucs = uniform_cost_search(travel_problem,
search_type=best_first_graph_search)
print("Solution", ucs.solution())
print()
print('-' * 50)
"""
python run_A_Star.py heuristicNo size steps
"""
arg = sys.argv
heuristic = int(arg[1])
p = puzzle(None, True, "inputState.txt", False, None)
startTime = time.time()
if heuristic == 0 :
solution = breadth_first_search(p)
elif heuristic == 1 :
solution = astar_search(p, lambda x : h1(x, p.goal))
elif heuristic == 2 :
solution = astar_search(p, lambda x : h2(x, p.goal))
elif heuristic == 3 :
solution = astar_search(p, lambda x : h3(x, p.goal))
elif heuristic == 4 :
solution = astar_search(p, lambda x : h4(x, p.goal))
solution = solution.solution()
if solution != None:
print "Actions made : ", len(solution)
print "Time elapsed : %.3f" % (time.time() - startTime)
#-------------------------------------------------------------------
# EJEMPLOS DE USO
# Problema 1: (3,3,1) -> (0,0,0) para 3 misioneros y 3 caníbales
prob1 = MisionerosYCanibales()
# Problema 2: (2,2,0) -> (0,0,1) para 3 misioneros y 3 caníbales
prob2 = MisionerosYCanibales((2, 2, 0), (0, 0, 1))
# Problema 3: (4,4,1) -> (2,2,0) para 4 misioneros y 4 caníbales
prob3 = MisionerosYCanibales((4, 4, 1), (2, 2, 0), 4)
# Problema 4: (6,5,1) -> (6,0,0) para 6 misioneros y 6 caníbales
prob4 = MisionerosYCanibales((6, 5, 1), (6, 0, 0), 6)
# Resolviendo el problema 1:
print("Solución del Problema 1 mediante búsqueda primero en anchura")
meta1 = breadth_first_search(prob1)
if meta1:
despliega_solucion(meta1)
else:
print("Falla: no se encontró una solución")
# Resolviendo el problema 2:
print("Solución del Problema 2 mediante búsqueda primero en anchura")
meta2 = breadth_first_search(prob2)
if meta2:
despliega_solucion(meta2)
else:
print("Falla: no se encontró una solución")
# Resolviendo el problema 3:
print("Solución del Problema 3 mediante búsqueda primero en anchura")
if __name__ == '__main__':
# TODO This should be unchanged in the final program you hand in, but it might be useful to make a copy,
# comment out one copy, and modify the other to get things to run more quickly while you're debugging
depths = (1, 2, 4, 8, 16)
trials = 100
path_lengths = {}
state_counts = {}
for depth in depths:
print('Gathering data for depth ' + str(depth) + '...')
path_lengths[depth] = {'BFS': [], 'IDS': [], 'A*-mis': [], 'A*-Man': []}
state_counts[depth] = {'BFS': [], 'IDS': [], 'A*-mis': [], 'A*-Man': []}
for trial in range(trials):
puzzle = EightPuzzle(depth)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['BFS'].append(len(search.breadth_first_search(p).path()))
state_counts[depth]['BFS'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['IDS'].append(len(search.iterative_deepening_search(p).path()))
state_counts[depth]['IDS'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['A*-mis'].append(len(search.astar_search(p, misplaced).path()))
state_counts[depth]['A*-mis'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['A*-Man'].append(len(search.astar_search(p, manhattan).path()))
state_counts[depth]['A*-Man'].append(p.states)
print('Path lengths:')
print('{:>5} {:>8} {:>8} {:>8} {:>8}'.format('Depth', 'BFS', 'IDS', 'A*-mis', 'A*-Man'))
for depth in depths:
print('{:>5} {:>8} {:>8} {:>8} {:>8}' \
.format(depth,
'BFS': [],
'IDS': [],
'A*-mis': [],
'A*-Man': []
}
state_counts[depth] = {
'BFS': [],
'IDS': [],
'A*-mis': [],
'A*-Man': []
}
for trial in range(trials):
puzzle = EightPuzzle(depth)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['BFS'].append(
len(search.breadth_first_search(p).path()))
state_counts[depth]['BFS'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['IDS'].append(
len(search.iterative_deepening_search(p).path()))
state_counts[depth]['IDS'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['A*-mis'].append(
len(search.astar_search(p, misplaced).path()))
state_counts[depth]['A*-mis'].append(p.states)
p = search.InstrumentedProblem(puzzle)
path_lengths[depth]['A*-Man'].append(
len(search.astar_search(p, manhattan).path()))
state_counts[depth]['A*-Man'].append(p.states)
print('Path lengths:')
print('{:>5} {:>8} {:>8} {:>8} {:>8}'.format('Depth', 'BFS', 'IDS',